phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('c8a9cc3d023a07f8c55a6f06d50a542b', -1, 1714019542, 1714019542, '12e318d1', -4, 0, 0)

Line : 187
File : sessions.php